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The high bandwidth and data rate demands of future wireless communications such as 6G and beyond can no longer be met with existing technologies that are mainly based on naturally occurring three-dimensional materials. The terahertz (THz) band refers to the electromagnetic frequency range lying between the millimetre-wave band and the infrared band, and it has become an increasingly promising frequency band that has the potential to be exploited for high-speed wireless communication networks of the future. Lately, the realisation of THz devices has been expedited through the emergence of two-dimensional materials (2DMs), such as graphene, perovskites, and transition metal dichalcogenides that can potentially unlock some long-standing problems related to the development of efficient control of transmission and detection of THz waves. In this paper, we cover several essential electrical features of …